Frequency Generator for CPU, QPI, FBD, PCIe Gen 2 & SATA

ICS9FG104D

Frequency Generator for CPU, QPI, FBD, PCIe Gen 2 & SATA

8

SMBus Table: Device Control Register, READ/WRITE ADDRESS (DC/DD)

Pin #

Name

Control Function

Type

0

1

Default

Bit 7

RW

Pin 17

Bit 6

RW

Pin 6

Bit 5

RW

Pin 24

Bit 4

RW

Pin 25

Bit 3

RW

Off

On

Pin 16

Bit 2

RW

Hardware Select Software Select

0

Bit 1

RW

Driven

Hi-Z

0

Bit 0

RW

Down

Center

0

Notes:

1. These bits reflect the state of the corresponding pins at power up, but may be written to

if Byte 0, bit 2 is set to '1'. FS3 is the SEL14M_25M# pin.

SMBus Table: Output Enable Register

Pin #

Name

Control Function

Type

0

1

Default

Bit 7

1

Bit 6

DIF_3 EN

Output Enable

RW

Disable

Enable

1

Bit 5

DIF_2 EN

Output Enable

RW

Disable

Enable

1

Bit 4

1

Bit 3

1

Bit 2

DIF_1 EN

Output Enable

RW

Disable

Enable

1

Bit 1

DIF_0 EN

Output Enable

RW

Disable

Enable

1

Bit 0

1

SMBus Table: Output Stop Control Register

Pin #

Name

Control Function

Type

0

1

Default

Bit 7

0

Bit 6

DIF_3 STOP EN

Free Run/ Stop Enable

RW

Free-run

Stop-able

0

Bit 5

DIF_2 STOP EN

Free Run/ Stop Enable

RW

Free-run

Stop-able

0

Bit 4

0

Bit 3

0

Bit 2

DIF_1 STOP EN

Free Run/ Stop Enable

RW

Free-run

Stop-able

0

Bit 1

DIF_0 STOP EN

Free Run/ Stop Enable

RW

Free-run

Stop-able

0

Bit 0

0

Reserved

Reserved

Reserved

See Frequency Selection Table,

Page 1

-

-

-

-

-

-

-

Byte 2

-

-

-

-

-

-

Byte 1

-

-

-

DIF_STOP# drive mode

SPREAD TYPE

16

-

Enable Software Control of Frequency, Spread Enable

(Spread Type always Software Control)

24

25

Byte 0

17

6

Reserved

Reserved

Reserved

Reserved

Reserved